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    <script>


        // 变量存储定时器的时候，存储的是序号

        var t1 = setTimeout(function () { 
            console.log(666) ;
        } , 0)


        var t2 = setTimeout(function () { 
            console.log(888) ;
        } , 3000)


        console.log(t1 , t2) ;


        // var t1 ;
        // var t2 ;

        // t1 = setTimeout()

        // t2 = setTimeout()


        // console.log(t1 , t2) ;




    


    </script>
    
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